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Has anyone gone catless, had it tuned, and then put cats back on without a tune update? I currently have LT's and an offroad x-pipe and wanted to put high flow cats on for sound attenuation (car is too damn loud). I do not have the handheld tuner used on the car (long story) and I do not want...

So I don't have an S550 but I think this could still be a valid question. Has anyone had an aftermarket LTH catless setup and decided to go back to catalytic converters? I have a 2011 GT and have stainless works LT with catless X-pipe for about 5 years and 25-30k miles. I want to put catalytic...

Why are vendors allowed to "bump" their sale threads daily AND all in a row. It's not a big deal if you look at each section individually, but if you go to the "New Posts" link, it just shows sale after sale after sale, all by the same vendors. Is it necessary? Can we limit the amount of...

Looking to purchase Nav APIM for SYNC 3. Do not need the screen, please PM me if you have one for sale!

I am putting my GTPP wheels, Blizzaks (245/45/19), 4 center caps and TPMS sensors up for sale. I sold my mustang in December and picked up a 3.5 Lariat F150. The wheels are in GOOD used condition. There are a couple of marks on one wheel which are included in the pictures. All of the tires are...